At least 22 people were killed after a leaking pipeline caught fire and exploded on Friday morning in the coastal city of Qingdao, in east China's Shandong Province, local authorities said. The number of injured people have not yet been confirmed. They are being treated in local hospitals, Xinhua reported. The accident happened around 10:30 a.m. in Huangdao District when workers were repairing the petroleum pipeline, which began leaking oil at around 3 a.m., according to the Qingdao government's publicity office. Oil flow through the pipeline was shut down at about 3:15 a.m.. The fire has been put out, and barricades have been set up to stop the oil from entering the sea. Pieces of cement and debris were scattered around the explosion site, which is close to the coast.